Functional Description - Danfoss Termix VVX Compact 28/18 - 7 BS-HC Series Operating Manual

Operating Guide Termix VVX Compact 28/18 – 7 Series BS-HC

2.0 Functional description

District heating substation for indirect heating and
instantaneous domestic hot water.
Application
The Termix VVX Compact 28 is a complete solution for hot water
and space heating with optimal safety, efficient energy transfer,
service-friendly construction and a compact design. The substation
is applicable, if a heat exchanger is required or on a conversion to
district heating, where the existing equipment is unsuitable for
direct connection.
District heating (DH)
The district heating circuit is prefabricated with a flow controller
with integrated control valve as well as thermometers and ball
valves.
Heating (HE)
The heating circuit consists of a plate heat exchanger, safety valve,
manometer, thermometers, ball valves, drain valve, air valve and
circulation pump and can be controlled thermostatically or by
an electronic controller with an outdoor temperature sensor.
Depending on the application, different heat exchangers can be
dimensioned.
Domestic hot water (DHW)
The domestic hot water is prepared in the heat exchanger and
the temperature is regulated with thermostatic or electronic
controls. The efficient heat exchanger offers exceptionally good
heat extraction with high output. No readjustment of the DHW
temperature is required after installation and initial setting of the
controls. The thermostatic control valve automatically retains the
comfort temperature of the hot water, even when the heating
system is in reduced operation during summer or if the district
heating plant changes operating parameters between summer and
winter, either by lowering or increasing the flow temperature of the
district heating water and/or the operating pressure in the network.
2 DEN-GT LGB42404